How do you calculate the atomic mass of magnesium?

Answer 1

You don't. You look it up in a table.

#m(Mg)=24.31"amu"#

Of course you may have #Mg# react with an element with known atomic mass, e.g. oxygen, and then weigh the before and after situation. But that's been done long ago, by the people who gave us those tables.

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Answer 2

Xavier Avery

Atomic mass of magnesium = (Isotope 1 mass × Isotope 1 abundance) + (Isotope 2 mass × Isotope 2 abundance) + ...

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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